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-   -   New size/bumper rules that every team should know (http://www.chiefdelphi.com/forums/showthread.php?t=153134)

Jon Stratis 08-01-2017 12:00

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by DaveL (Post 1627033)
I'm with Blake on this issue and think it needs to be explained by FIRST as its hard to believe they really want us to build small robots with a frame perimeter of 120 inches.

To me, it sounds like reasonable restrictions to make it a good engineering challenge. The game pieces are small this year. Like, really small... I can't remember having one this small before. And there are a lot of them. 600, to be precise. Allowing larger robots means more storage space for game pieces. Smaller robots means the game can playout with game pieces available for everyone, instead of the two robots that hoard everything and shoot them in. Plus, it forces robots to make more trips to shoot, which helps with the requirements for the boiler processing fuel - you would hate to have 300 fuel dumped in 5 seconds before the end of the game and most of it not get counted.

FrankJ 08-01-2017 12:32

Re: New size/bumper rules that every team should know
 
Speaking of small robots. The 2014 rules called for a 112 in frame perimeter. That was the year of the Frisbee. One of the better games by most opinions.

Joe G. 08-01-2017 13:04

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by FrankJ (Post 1627174)
Speaking of small robots. The 2014 rules called for a 112 in frame perimeter. That was the year of the Frisbee. One of the better games by most opinions.

2014 (Aerial Assist) and 2013 (Ultimate Ascent) were both 112" perimeter. Additionally, most teams chose to be under 30" tall in Ultimate Ascent, and significantly shorter in Aerial Assist. And both were played with a much bulkier control system. In Steamworks, by comparison, if you choose to have the smaller base, you'd better have a very good reason for the 24"-36" part of your robot, as I can think of numerous advantages to the short/wide configuration.

JB987 08-01-2017 13:32

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by ToddF (Post 1627138)
Kind of makes sense that they released these for 2017, huh?

http://www.wcproducts.net/wcp-ds-flipped

Total coincidence I'm sure ;)

Joe Ross 08-01-2017 13:52

Re: New size/bumper rules that every team should know
 
I think there needs to be a sawzall packed in the inspector's crate.

Aur0r4 08-01-2017 14:34

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by traxxasracr1 (Post 1626730)
I'm still a little unclear on the frame permiter. If you choose the 30x32x36 size, does that mean you need to account for the ~3.5" of bumper on each side, leaving you with a max frame size of 23x25?? That seems a bit ridiculous. Granted it's probably doable, but I can't imagine FIRST having that tight size constraints

Since frame perimeter no longer matters.....why can't the robot be the full 30x32 above the bumpers?

Joe G. 08-01-2017 14:39

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by Aur0r4 (Post 1627236)
Since frame perimeter no longer matters.....why can't the robot be the full 30x32 above the bumpers?

Frame perimeter still defines the starting configuration. You could expand into the region above the bumper during the match, but you need to start the match inside the classical frame perimeter.

Aur0r4 08-01-2017 14:40

Re: New size/bumper rules that every team should know
 
True.

dradel 08-01-2017 15:36

Re: New size/bumper rules that every team should know
 
lets not forget about the FIRST iron ons we have to put on the bumpers.....

one4robots 08-01-2017 15:59

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by Steven Carmain (Post 1626682)
New this year,the top of the bumpers is 7" this year (think bumpers end up 5.5-6.5" tall with fabric. My memory says last year the bumper zone was 5-12" off the ground.

Steve,
I noticed this, too. There will be a LOT of balls on the field, so a low profile robot will be beneficial in navigating through all the balls. Our team will likely have bumpers as low as possible. An added benefit of low profile is more volume up top to use for storage, etc.
Vince

MonroeM 08-01-2017 16:08

Re: New size/bumper rules that every team should know
 
Was anyone else surprised by the size of the fuel? A 5in wiffle ball is pretty big.

Donut 08-01-2017 17:04

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by Munchskull (Post 1626978)
A frame perimeter of 23" x 25" seems tiny! Any ideas of how to make the most of vertical space?

We kept to a 24" x 26" perimeter last season while staying short enough for the low bar, so it is doable. We did strictly defenses but our arm for defense manipulation cut through 13" of our 26" frame, and there was room for a ball manipulator we were working to try to add at our regional.

Mounting all the large electronics vertically and grouping by power and control sections is how we freed up most of our space. RoboRio, radio, signal light, and VRM went on one side of the bot, battery, PDP, and main breaker went on the other. All were mounted on vertical boards from the chassis bottom to our top frame rails, so 7"-8" of space.

mjc49 08-01-2017 17:06

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by one4robots (Post 1627296)
Steve,
I noticed this, too. There will be a LOT of balls on the field, so a low profile robot will be beneficial in navigating through all the balls. Our team will likely have bumpers as low as possible. An added benefit of low profile is more volume up top to use for storage, etc.
Vince

Almost lke a big ball pit where little robots go to play.

NShep98 08-01-2017 17:19

Re: New size/bumper rules that every team should know
 
Quote:

Originally Posted by dradel (Post 1627282)
lets not forget about the FIRST iron ons we have to put on the bumpers.....

Quote:

BUMPER Markings visible when installed on the ROBOT, other than the following, are
prohibited:
...
C. solid white FIRST logos between 4¾ in. (~13 cm) and 5¼ in. wide (~13 cm) (i.e.
comparable to those distributed in the 2017 Kickoff Kit).
Nowhere does it say we have to use those logos. They are simply one of the limited markings allowed to be on them.

PantherRobotics 08-01-2017 19:02

Re: New size/bumper rules that every team should know
 
Very frustrated with FIRST right now. We choose to get the Andmark base kit with our kit of parts. If we try and use volume choice B with the 36" height we cannot use the andymark kit. Basically it invalidates a $450 part. Look at the wheel spacing, size of wheels, and gear belts and the locations for pre drilled holes. Unless I am incorrect the only sizing you can use and make that chase kit work is Volume A


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